<!DOCTYPE html>
<!--conf
<sample>
              <product version="4.0b1" edition="std"/>
                     <modifications>
                            <modified date="130911"/>
                     </modifications>
               </sample>
-->
<html>
<head>
	<title>onChange/onBeforeChange events</title>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<link rel="stylesheet" type="text/css" href="../../../codebase/dhtmlx.css"/>
	<script src="../../../codebase/dhtmlx.js"></script>
	<style>
		div#simpleLog {
			width: 500px;
			height: 200px;
			font-family: Tahoma;
			font-size: 11px;
			overflow: auto;
		}
		span.allow {
			color: green;
		}
		span.deny {
			color: red;
		}
	</style>
	<script>
		var myForm, formData, logObj;
		function doOnLoad() {
			formData = [
				{type: "settings", position: "label-right"},
				{item: "label", label: "Some checkboxes"},
				{type: "checkbox", name: "ch_allow", value: "value_allow", label: "This checkbox is allowed to be changed"},
				{type: "checkbox", name: "ch_deny", value: "value_deny", label: "This checkbox - NOT"}
				
			];
			myForm = new dhtmlXForm("myForm", formData);
			myForm.attachEvent("onBeforeChange", function(name,value,is_checked){
				var status = (name.search(/allow/) >= 0);
				logEvent("onBeforeChange, item name '"+name+"', value '"+value+"', is checked '"+(is_checked?"true":"false")+"', "+(status?"<span class='allow'>":"<span class='deny'>not ")+"change</span><br>");
				return status;
			});
			myForm.attachEvent("onChange", function(name,value,is_checked){
				logEvent("onChange, item name '"+name+"', value '"+value+"', is checked '"+(is_checked?"true":"false")+"'<br>");
			});
		}
		function logEvent(t) {
			if (!logObj) logObj = document.getElementById("simpleLog");
			logObj.innerHTML += t;
		}
		function clearLog() {
			if (!logObj) logObj = document.getElementById("simpleLog");
			logObj.innerHTML = "";
		}
	</script>
</head>
<body onload="doOnLoad();">
	<table>
		<tr><td><div id="myForm"></div></td></tr>
		<tr><td><b>Log (<a href="javascript:void(0);" onclick="clearLog();">clear</a>)</b></td></tr>
		<tr><td><div id="simpleLog"></div></td></tr>
	</table>
</body>
</html>